摘要
深水地层是油气资源的重要接替区。压力控制贯穿油气钻采的整个过程,是安全高效作业的基础。本文以压力控制为主线,从复杂地层压力体系形成机制与预测方法、窄密度窗口地层钻井井筒压力安全控制模式、油气开采长效流动保障机制、环空圈闭压力演变机理与控制方法等四个方面,阐述了国内外深水油气钻采井筒压力控制基础研究的新进展。结合我国面临的深水地层压力体系复杂、井筒压力控制难度大、油气长效流动保障困难和环空圈闭压力控制难等瓶颈问题,提出了深水油气钻采全生命周期井筒压力控制的攻关方向,包括:明确多源多机制复杂地层压力体系形成机理,建立深水软岩地层安全密度窗口预测方法;提高井筒压力预测精度,研发适用于深水钻井的变梯度控压钻井新技术;完善压裂充填防砂新方法,形成集防砂、控水与水合物防治于一体的深水油气井长效流动保障机制;加强环空圈闭压力形成及演变机理研究,形成相应的控制方法等。
Deepwater is an important replacement area of energy in our country.The pressure control transfers the whole process of oil and gas drilling and production,which is the basis of safe and efficient operation.This article takes pressure control as the mainline,and expounds the latest progress of basic research on wellbore pressure control in deepwater oil and gas drilling and production at home and abroad from four aspects:formation mechanism and prediction method of complex formation pressure system,safety control mode of wellbore pressure with narrow density window,long-term flow guarantee mechanism of oil and gas extraction,and evolution mechanism and control method of annular trap pressure.Combined with the bottleneck problems in deepwater such as complex formation pressure system,great difficulty of wellbore pressure control,difficulty of long-term oil and gas flow guarantee,and difficulty of annular trap pressure control,the key research directions of wellbore pressure control during the whole life cycle of deepwater oil and gas drilling and production are proposed.the key research directions contain the following points.(1)To clarify the formation mechanism of multi-source and multi-mechanism complex formation pressure system,and establish the prediction method of safe density window for a deepwater soft rock formation.(2)To improve the accuracy of wellbore pressure prediction,and develop a multi-gradient managed pressure drilling technology suitable for deepwater drilling platforms.(3)To improve the new method of fracturing packing and sand control,and form the long-term flow guarantee mechanism integrating sand control,water control and hydrate control for deepwater oil and gas well.(4)To strengthen the research on the evolution mechanism of annular trap pressure,and form the control method for annular trap pressure.
作者
李军
杨宏伟
张辉
王江帅
高热雨
张锐尧
Li Jun;Yang Hongwei;Zhang Hui;Wang Jiangshuai;Gao Reyu;Zhang Ruiyao(China University of Petroleum-Beijing at Karamay,Karamay 834000;China University of Petroleum-Beijing,Beijing 102249)
出处
《中国科学基金》
CSSCI
CSCD
北大核心
2021年第6期973-983,共11页
Bulletin of National Natural Science Foundation of China
基金
国家自然科学基金项目(51734010,52104012)
中国博士后科学基金项目(2021M693494)的资助。
关键词
深水油气
地层压力体系
井筒压力
井筒流动保障
环空圈闭压力
deepwater oil and gas
formation pressure system
wellbore pressure
flow guarantee in wellbore
trap pressure
